Incorrect configuration causes strange errors

[fantapop]

This is a Bug Report

Description

I accidentally configured the plugin incorrectly and instead of failing gracefully, a cloudformation upload was attempted and failed spectacularly.

For bug reports:

• What went wrong?

• What did you expect should have happened? An error message saying the config was invalid should be printed

• What was the config you used?

• alerts: {

• alarms: [

• 'functionThrottles',

• 'functionErrors',

• 'functionInvocations',

• 'functionDuration',

• ],

• dashboards: true,

• topics: '${self:custom.service}-${self:custom.stage}-alerts-alarm',

• }

  
  (note that topics should have ```alarm``` nested underneath but it doesn't.

• What stacktrace or error message from your provider did you see? Many AWS::SNS::Topic objects were attempted to be created, it looks like one per alarm if it were operating correctly. It then fails to create these topics saying they "already exist":

  
  Serverless Error ---------------------------------------
  
  An error occurred: AwsAlerts43 - r already exists in stack arn:aws:cloudformation:us-west-2:12345678910:stack/servicename-my-api-my-env/5c073420-d0c9-11e8-9030-0254f5c7f298.

Additional Data

• Serverless Framework Version: 1.32.0
• Stack Trace:
• Provider Error messages:

[agrawaltarun]

I encountered this one today again. Serverless: View the full error output: <>

Serverless Error ---------------------------------------

An error occurred: AwsAlertsNonCriticalAlarm - dev11-dev-P3-nonCritical-alerts-alarm already exists in stack arn:aws:cloudformation:us-east-1:

Get Support -------------------------------------------- Docs: docs.serverless.com Bugs: github.com/serverless/serverless/issues Issues: forum.serverless.com

Your Environment Information --------------------------- Operating System: darwin Node Version: 12.13.1 Framework Version: 2.1.1 Plugin Version: 4.0.4 SDK Version: 2.3.2 Components Version: 3.1.3